let me just show you an example of resonance with a couple of tuning forks. i've got these tuning forks so that they're the same frequency. i think they're 256. yeah, 256, musical note c. yeah? okay. what i'm gonna do is i'm gonna strike one fork, and you listen. hear that? now, you guys think, "oh, hewitt struck that one too." no, i didn't do it. why don't we try it again? watch. no, no, no. okay? i can resist horsing around. you get the--i strike this from what? either hands. ain't that neat, huh? the wonders of science, yay. all right? we call that resonance, gang. resonance. now, hc. how come this resonate? we can understand resonance if we think small. this is something you can really understand. watch. i'm gonna strike this. this thing is gonna-- flap back and forth, yeah. flap back and forth. isn't it like that ping pong ball, hitting the balls, right? those things like-- back and forth to you. and also we have--over here. yep. do you believe that little pitter-patters of molecules could bend hard steel? yep. how many say, "oh, no, that could never hap